The EU has declared three leaks in two Russia-Germany gas pipelines to be the work of sabotage and suspicion has fallen on Russia.
Some commentators have suggested the leaks are linked to the Ukraine war, though the Kremlin has described the accusations it was behind them as “predictable” and “stupid”.
Here is what we know about what happened to Nord Stream 1 and 2, who could have been responsible and what’s being done about it.
What happened and where
On Monday morning, at around 2am local time, bubbles are thought to have started erupting on the surface of a section of the Baltic Sea between Sweden and Poland, about 14 miles (23km) southeast of Denmark’s Bornholm Island.
That morning, it was reported that pressure in the Nord Stream 2 pipeline had dropped overnight from 105 bars to 7 bars, indicating a leak.
The Nord Stream 2 pipe runs for 764 miles (1,230km) from Russia through the Baltic Sea to Germany and had been due to carry billions of cubic feet of gas to Europe until Russia invaded Ukraine and Germany refused to grant the pipeline’s operators a licence, leaving it mothballed.
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Denmark scrambled military aircraft to look for signs of a leak and identified an area of disturbed sea, which they designated a danger to shipping.
The time of the leak was confirmed by readings taken by seismologists in neighbouring countries, who registered the equivalent of an earthquake magnitude of 1.8, which they triangulated to have occurred at almost exactly the same spot as the leak was bubbling to the surface.
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About 17 hours after the Nord Stream 2 reading was taken, a second reading was recorded by seismologists northeast of Bornholm, indicating another incident.
Shortly after, Nord Stream AG, the operator of the Nord Stream 1, said it was looking into causes of a drop in pressure in the pipeline.
Again, seismologists’ readings located the incident to a specific location – around 34 miles (55km) northeast of Bornholm Island.
The following morning, Sweden’s Maritime Authority issued a warning of two leaks in the Nord Stream 1 pipeline in its and Danish waters, bringing the total number of leaks to three.
Nord Stream 1 follows a similar but not identical route from Russia to Germany and had been used to ship Russian gas to Europe since 2011, until the outbreak of the Ukraine war.
As Europe reeled from the Vladimir Putin’s invasion, it moved to reduce its reliance on gas from Russia, and simultaneously, flows through Nord Stream 1 to Europe from Russia decreased until no gas was flowing through the pipeline.
Footage from the scene taken from a Danish plane showed frothy seas, up to a kilometre wide.
What do the experts say
Initially, the European countries nearby were cautious, saying investigation was needed to find out what had happened.
The operator of the pipelines said the leaks were “unprecedented”, but did not have an explanation for them.
The Kremlin was quick to say sabotage could not be ruled out.
In the course of Tuesday, seismologists who had recorded the incidents said their analysis indicated the tremors had been caused by explosions.
Bjorn Lund, director of the Swedish National Seismic Network, said: “There’s no doubt, this is not an earthquake.”
By Wednesday, many politicians were adamant that the damage to the pipes was caused by human activity and deliberate, rather than because of earthquakes or accidental.
Danish defence minister Morten Bodskov said on Wednesday: “Our assessment is… that the breakage on the pipes is not an accident but a deliberate act.”
Image: The Danish and Swedish military have been observing the bubbling at the surface. Pic: Swedish Coast Guard
Who was responsible
Very early on, suspicion fell on Russia. A number of commentators asked who would profit from such ruptures in the pipelines, noting how it had the potential to affect gas prices.
Ukraine blamed Russia immediately, with presidential adviser Myhailo Podolyak saying the leak was “a terrorist attack planned by Russia and an act of aggression towards the EU”, without offering any evidence.
Gas prices soared again on Monday, largely in reaction to a threat from Moscow to sanction Ukrainian energy firm Naftogaz, raising the possibility that one of the last functioning Russian gas supply routes to Europe would close down.
But many expressed disbelief that Russia would target infrastructure that carried gas that it had sold, threatening its future revenues. Kremlin spokesman Dmitry Peskov called such accusations “predictable and… stupid”.
Yet there has been much speculation that an attack by Russia on the pipelines could be a warning to the West not to escalate the Ukraine war further.
This is because the pipelines were not operational at the time and they supplied Russian gas, so would be less likely to be seen as a further significant provocation.
Russia has been becoming increasingly frustrated that Western supplied weapons have been helping Ukraine resist Moscow’s invasion.
On Tuesday Poland’s President Andrzej Duda symbolically opened the valve of a yellow pipe belonging to the Baltic Pipe, a new system sending Norwegian gas across Denmark and the Baltic Sea to Poland, which he hailed as ending “Russian domination in the gas sphere”.
Some commentators have pointed out that while the gas leaks erupted in Denmark and Sweden’s Exclusive Economic Zones, they were outside their territorial waters, and therefore could be classed as having happened in international waters, making retaliation more complicated.
Others have cited the fact that there are significant networks of piping under the North Sea that could be vulnerable to attack. If the cause of the leaks is proven to have been an attack, it would reveal the ease with which undersea infrastructure can be targeted.
The method used by any potential saboteurs is far from clear. Russia has submarines which Western experts say are equipped to attack international internet cables, but there are suggestions the vessel was out of range at the time. Others say deep sea divers, travelling from the nearby Russian exclave of Kaliningrad, could have planted a device.
How will we find out
Experts say they expect that navies from surrounding countries will send teams with specialist experience into the area to carry out investigations.
Mr Bodskov said the Danish military had increased its presence within and around the area of Bornholm and they would be “doing everything within their power to get this clarified which is happening in close collaboration with our partners”.
But he said it may take some weeks.
“If you listen to the experts about how much gas there is the pipes and how long it will take before the pressure drops, then the reality is that might take a week, 14 days before it is calm enough in the area to actually see what has happened,” he added.
Any investigation is likely to look closely at damage to the pipes, which, at around 1,153mm in diameter with 34mm thick steel walls, surrounded by, in some cases, more than 110mm of concrete, would be difficult to crack.
Image: Investigations are likely to look at damage to the pipe which is 34mm thick steel and covered, when underwater, with more than 100mm of concrete
Peter Faulding, one of the foremost British underwater forensic investigators, whose Specialist Group International has been involved in numerous undersea investigations carried out by UK police, said he expects the initial investigation to involve remotely operated vehicles (ROVs), which are also known as drones.
“People will be very wary about putting divers near it because… you’ve got a large amount of gas coming out,” he told Sky News.
“I would say they’d be using remote operated vehicles to go down. An ROV, because they have manipulators on the front. If there was any debris, the manipulator… can retrieve the evidence and an ROV will give crystal clear pictures without putting a diver in jeopardy.
“A lot them are autonomous now. They can send them down without a cable and they can actually pick things up off the sea bed.
“You would see what it was. If it was done with explosive, it will be very rough. There’ll be residues. There’d be fragments.“
“From that, they can carry out appropriate forensic tests to see what explosive it was, if an explosive has been used.”
Mr Faulding, who has previous military experience and carries out consultancy work for the energy industry, said once it was safe, because the pipelines are at a depth of about 70m, the navies would probably put down divers operating out of a diving bell, but they would have to breathe a special mixture and would work in a similar way to those who carry out work on undersea oil facilities.
He said it should not be difficult to work out which explosive, if any, had been used, but it would be extremely difficult, if not impossible, to work out who carried out an attack.
What are the consequences
In the immediate aftermath, European leaders expressed concern and said they would work to find out what had happened.
The gas markets remained volatile, but experts said that much of Tuesday’s volatility was due to fears that Russia would stop shipping gas through Ukraine, rather that because of the possibility of an attack on Nord Stream 1 or 2.
Nonetheless, experts said that the leaks had added to the uncertainty that has been fuelling much higher gas prices this year than in previous years.
Image: Norway has a substantial gas and oil industry network across the North Sea, supplying much of Europe
Gas analyst Tom Marzec-Manser told Sky News: “The market opened bullishly yesterday in response to the Nord Stream stuff. But then it jumped significantly when that Ukraine development happened, when Gazprom threatened the sanctions. That actually was a larger wedge of the gains yesterday. But it’s definitely all part and parcel of the… loss of yet more Russian gas (being) the main driver to a 27% jump yesterday in wholesale prices.”
Despite doubts in the gas industry that any potential attacks could spread, Norway’s state oil company, Equinor, said it would raise its level of preparedness.
The alert was raised overnight and applies to all of Equinor’s facilities.
Norway is a major producer of offshore oil and gas and its energy exports have surged as European countries scramble to find alternatives to Russian energy supplies.
Norwegian Prime Minister Jonas Gahr Store said: “We are concerned with taking good care of the safety of our own oil and gas installations, and we have stepped up the state of preparedness regarding them today.”
Royal Norwegian Navy officer Lieutenant Commander Tor Ivar Strommen warned that there could be attacks on Norwegian energy exports “in the next half year”.
NATO and the European Union stressed the need to protect critical infrastructure and warned of a “robust and united response” should there be more attacks.
Mr Strommen told Reuters: “The Norwegian government has to realise that by far the most important strategic object in all of Europe now is the energy or gas imports from Norway.
“If those deliveries should be cut or stopped or reduced by a large amount, this would cause a complete energy crisis in Europe.”
Donald Trump has announced a 10% trade tariff on all imports from the UK – as he unleashed sweeping tariffs across the globe.
Speaking at a White House event entitled “Make America Wealthy Again”, the president held up a chart detailing the worst offenders – which also showed the new tariffs the US would be imposing.
“This is Liberation Day,” he told a cheering audience of supporters, while hitting out at foreign “cheaters”.
He claimed “trillions” of dollars from the “reciprocal” levies he was imposing on others’ trade barriers would provide relief for the US taxpayer and restore US jobs and factories.
Mr Trump said the US has been “looted, pillaged, raped, plundered” by other nations.
Image: Pic: AP
His first tariff announcement was a 25% duty on all car imports from midnight – 5am on Thursday, UK time.
Mr Trump confirmed the European Union would face a 20% reciprocal tariff on all other imports. China’s rate was set at 34%.
The UK’s rate of 10% was perhaps a shot across the bows over the country’s 20% VAT rate, though the president’s board suggested a 10% tariff imbalance between the two nations.
It was also confirmed that further US tariffs were planned on some individual sectors including semiconductors, pharmaceuticals and critical mineral imports.
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6:39
Trump’s tariffs explained
The ramping up of duties promises to be painful for the global economy. Tariffs on steel and aluminium are already in effect.
The UK government signalled there would be no immediate retaliation.
Business and Trade Secretary Jonathan Reynolds said: “We will always act in the best interests of UK businesses and consumers. That’s why, throughout the last few weeks, the government has been fully focused on negotiating an economic deal with the United States that strengthens our existing fair and balanced trading relationship.
“The US is our closest ally, so our approach is to remain calm and committed to doing this deal, which we hope will mitigate the impact of what has been announced today.
“We have a range of tools at our disposal and we will not hesitate to act. We will continue to engage with UK businesses including on their assessment of the impact of any further steps we take.
“Nobody wants a trade war and our intention remains to secure a deal. But nothing is off the table and the government will do everything necessary to defend the UK’s national interest.”
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0:43
Who showed up for Trump’s tariff address?
The EU has pledged to retaliate, which is a problem for Northern Ireland.
Should that scenario play out, the region faces the prospect of rising prices because all its imports are tied to EU rules under post-Brexit trading arrangements.
It means US goods shipped to Northern Ireland would be subject to the EU’s reprisals.
The impact of a trade war would be expected to be widely negative, with tit-for-tat tariffs risking job losses, a ramping up of prices and cooling of global trade.
Research for the Institute for Public Policy Research has suggested more than 25,000 direct jobs in the UK car manufacturing industry alone could be at risk from the tariffs on car exports to the US.
The Society of Motor Manufacturers and Traders (SMMT) had said the tariff costs could not be absorbed by manufacturers and may lead to a review of output.
The tariffs now on UK exports pose a big risk to growth and the so-called headroom Chancellor Rachel Reeves was forced to restore to the public finances at the spring statement, risking further spending cuts or tax rises ahead to meet her fiscal rules.
A member of the Office for Budget Responsibility (OBR), David Miles, told MPs on Tuesday that US tariffs at 20% or 25% maintained on the UK for five years would “knock out all the headroom the government currently has”.
But he added that a “very limited tariff war” that the UK stays out of could be “mildly positive”.
He said: “There’s a bit of trade that will get diverted to the UK, and some of the exports from China, for example, that would have gone to the US, they’ll be looking for a home for them in the rest of the world.
“And stuff would be available in the UK a bit cheaper than otherwise would have been. So there is one, not central scenario at all, which is very, very mildly potentially positive to the UK. All the other ones which involve the UK facing tariffs are negative, and they’re negative to very different extents.”
Israel is beginning a major expansion of its military operation in Gaza and will seize large areas of the territory, the country’s defence minister said.
Israel Katz said in a statement that there would be a large scale evacuation of the Palestinian population from fighting areas.
In a post on X, he wrote: “I call on the residents of Gaza to act now to remove Hamas and return all the hostages. This is the only way to end the war.”
He said the offensive was “expanding to crush and clean the area of terrorists and terrorist infrastructure and capture large areas that will be added to the security zones of the State of Israel”.
The expansion of Israel’s military operation in Gaza deepens its renewed offensive.
The deal had seen the release of dozens of hostages and hundreds of Palestinian prisoners, but collapsed before it could move to phase two, which would have involved the release of all hostages and the withdrawal of Israeli forces from Gaza.
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1:08
26 March: Anti-Hamas chants heard at protest in Gaza
The Israel Defense Forces (IDF) had already issued evacuation warnings to Gazans living around the southern city of Rafah and towards the city of Khan Yunis, telling them to move to the al Mawasi area on the shore, which was previously designated a humanitarian zone.
Israeli forces have already set up a significant buffer zone within Gaza, having expanded an area around the edge of the territory that had existed before the war, as well as a large security area in the so-called Netzarim corridor through the middle of Gaza.
This latest conflict began when Hamas launched an attack on Israel on 7 October 2023, killing around 1,200 people and taking around 250 hostages.
The ensuing Israeli offensive has killed more than 50,000 Palestinians, according to Gaza’s Hamas-run health ministry.
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1:22
Bodies of aid workers found in Gaza
Aid group Doctors Without Borders warned on Wednesday that Israel’s month-long siege of Gaza means some critical medications are now short in supply and are running out, leaving Palestinians at risk of losing vital healthcare.
“The Israeli authorities’ have condemned the people of Gaza to unbearable suffering with their deadly siege,” said Myriam Laaroussi, the group’s emergency coordinator in Gaza.
“This deliberate infliction of harm on people is like a slow death; it must end immediately.”
“Liberation day” was due to be on 1 April. But Donald Trump decided to shift it by a day because he didn’t want anyone to think it was an April fool.
It is no joke for him and it is no joke for governments globally as they brace for his tariff announcements.
It is stunning how little we know about the plans to be announced in the Rose Garden of the White House later today.
It was telling that we didn’t see the President at all on Tuesday. He and all his advisers were huddled in the West Wing, away from the cameras, finalising the tariff plans.
Treasury Secretary Scott Bessent is the so-called ‘measured voice’. A former hedge fund manager, he has argued for targeted not blanket tariffs.
Peter Navarro is Trump’s senior counsellor for trade and manufacturing. A long-time aide and confidante of the president, he is a true loyalist and a firm believer in the merits of tariffs.
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His economic views are well beyond mainstream economic thought – precisely why he appeals to Trump.
The third key character is Howard Lutnick, the commerce secretary and the biggest proponent of the full-throttle liberation day tariff juggernaut.
The businessman, philanthropist, Trump fundraiser and billionaire (net worth ranging between $1bn and $2bn) has been among the closest to Trump over the past 73 days of this presidency – frequently in and out of the West Wing.
If anything goes wrong, observers here in Washington suspect Trump will make Lutnick the fall guy.
And what if it does all go wrong? What if Trump is actually the April fool?
“It’s going to work…” his press secretary said when asked if it could all be a disaster, driving up the cost of living for Americans and creating global economic chaos.
“The president has a brilliant team who have been studying these issues for decades and we are focussed on restoring the global age of America…” Karoline Leavitt said.
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2:52
‘Days of US being ripped off are over’
Dancing to the president’s tune
My sense is that we should see “liberation day” not as the moment it’s all over in terms of negotiations for countries globally as they try to carve out deals with the White House. Rather it should be seen as the start.
Trump, as always, wants to be seen as the one calling the shots, taking control, seizing the limelight. He wants the world to dance to his tune. Today is his moment.
But beyond today, alongside the inevitable tit-for-tat retaliation, expect to see efforts by nations to seek carve-outs and to throw bones to Trump; to identify areas where trade policies can be tweaked to placate the president.
Even small offerings which change little in a material sense could give Trump the chance to spin and present himself as the winning deal maker he craves to be.
One significant challenge for foreign governments and their diplomats in Washington has been engaging the president himself with proposals he might like.
Negotiations take place with a White House team who are themselves unsure where the president will ultimately land. It’s resulted in unsatisfactory speculative negotiations.
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6:03
Treasury minister: ‘We’ll do everything to secure a deal’
Too much faith placed in the ‘special relationship’?
The UK believes it’s in a better position than most other countries globally. It sits outside the EU giving it autonomy in its trade policy, its deficit with the US is small, and Trump loves Britain.
It’s true too that the UK government has managed to accelerate trade conversations with the White House on a tariff-free trade partnership. Trump’s threats have forced conversations that would normally sit in the long grass for months.
Yet, for now, the conversations have yielded nothing firm. That’s a worry for sure. Did Keir Starmer have too much faith in the ‘special relationship’?
Downing Street will have identified areas where they can tweak trade policy to placate Trump. Cars maybe? Currently US cars into the UK carry a 10% tariff. Digital services perhaps?
US food? Unlikely – there are non-tariff barriers on US food because the consensus seems to be that chlorinated chicken and the like isn’t something UK consumers want.
Easier access to UK financial services maybe? More visas for Americans?
For now though, everyone is waiting to see what Trump does before they either retaliate or relent and lower their own market barriers.